CN103046638A - Pipe jacking construction method - Google Patents
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- CN103046638A CN103046638A CN 201210575941 CN201210575941A CN103046638A CN 103046638 A CN103046638 A CN 103046638A CN 201210575941 CN201210575941 CN 201210575941 CN 201210575941 A CN201210575941 A CN 201210575941A CN 103046638 A CN103046638 A CN 103046638A
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Abstract
The invention discloses a pipe jacking construction method. The pipe jacking construction method includes steps of (1), measuring and paying off lines; (2), constructing a working well; (3), mounting an assembly type back wall; (4) mounting a guide rail; (5), mounting a main jack; (6), mounting an oil pump; (7), mounting jacking iron; (8) constructing and sealing an access hole; (9) jacking a pipe; and (10) excavating; wherein elevation, a central line and horizontal level of the guide rail are required to be checked and corrected after each section of the pipe enters, adjacent surfaces of the jacking iron are perpendicular to each other, a locking device is arranged on the jacking iron, the jacking iron is disposed stably, and when jacking force is higher, an arc-shaped jacking iron steel plate is supposed to be added on the pipe end face.
Description
Technical field
The present invention relates to the construction project field, particularly a kind of pipe jacking construction method.
Background technology
Along with the development in city and the progress of technology, the municipal drainage pipeline pipe jacking construction technique has obtained fast development, and the scope of use constantly enlarges, and has developed into gradually a no-excavation construction method.As a kind of no-excavation construction method, pipe jacking construction technique have the construction inner surface of pipeline smooth, speed of application is fast, working security good, the advantages such as good seal performance, construction noise is little, the place is little, depth of implements is dark are the most widely used pick pipeline of town road drainage construction Push Technologies.But the impact that how to reduce the construction plant surrounding environment is the problem that engineers and technicians face.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of pipe jacking construction method.
When the present invention worked at development machine, cutterhead was close to the soil body section that is cut by predefined pressure, and the one side rotary cutting soil body under the effect of top power is pushed ahead the balance of keeping the soil body on the one hand in the wings.If soil body hardness increases in the jacking, push up fastly when constant, cutterhead is subject to head resistance greater than the cutterhead pressure that presets, and cutterhead is retracted gradually backward, keeps cutterhead constant to the pressure of the soil body.When cutterhead was retracted, the Tu Kou that cuts of cutterhead increased automatically, and the amount of the cutting soil body increases, and the soil body reduces the pressure of cutterhead, and soil pressure increases, and cutterhead still keeps balance with soil pressure and the soil body that presets at reposition.Cooperate the manual adjustments cutterhead to cut the regulatory function of Tu Kou and preset pressure size, make soil body lateral pressure obtain point-device balance.Manual-lock is cut Tu Kou during shutdown, and cutterhead still keeps predetermined pressure to be close to the soil body, and with muddy water storehouse and Excavation isolation.No matter the soil body is crossed softly or really up to the mark, and when automatic adjustable range value of reaching the limit of, the cutterhead warning device is reported to the police, and reminds operating personnel to note, by regulating top speed, resets the means such as cutterhead pressure, makes the soil body keep new balance.
The present invention injects the mud of certain pressure to the excavation storehouse, this mud by the size of control mud extraction flow, thereby simply and is exactly controlled water pressure in the muddy water storehouse, balance underground water except the particle in the soil layer can being taken away.
Construction sequence comprises:
(1) measures unwrapping wire
Lay temporary bench mark and conduit axis control stake, during the construction line-putting, establish Center stake every 20m, the place arranges Center stake at manhole.
(2) construction of working shaft
In active well reservation notch suitable for reading, steel bar concrete precast slab is installed, is wanted the seat slurry full in the notch.The wall of laying bricks at precast plate reserved opening place, all bricks are wanted saturated with water, and Ying Manpu, full squeezing are taken up and down block when building by laying bricks or stones, and thickness of mortarat bed joint and perpends width should be even, and vertical straight joint must not be arranged.When building manhole by laying bricks or stones, should install synchronously and mark time, want accurately the position, must not trample before masonry mortar reaches regulation compressive strength after the installation of marking time.
(3) parados is installed behind the assembling
The parados back soil body must be evenly closely knit behind the assembling, and wall should be smooth, and with pipeline jacking perpendicular direction; Back soil body wall should be close to rear parados, should adopt the sand material filling closely knit when hole is arranged.The bottom of parados following 500mm at the bottom of working pit behind the assembling, thus make rear jack center of effort highly be not less than 1/3 of back lumps of wood height, the point of making a concerted effort of being broken ground behind origin of force and the wall is consistent.Parados verticality allowable variation is parados height behind 0.1% assembling behind the assembling, and horizontal torsion degree allowable variation is parados length behind 0.1% assembling.
(4) guide rails assembling
During guide rails assembling and active well base plate pre-embedded steel slab weld, and enclose the jail with type steel support.To check first the pipeline center position before the guide rails assembling, guarantee that the elevation of guide rail, axial location are accurate.The rail axis position deviation is no more than 3mm, and the elevation of top surface deviation is no more than 3mm, is no more than 2mm apart from deviation in two rails.The guide rail end can not be too far away apart from the work wall, should be controlled at about 500mm, and reserving seam during guide rails assembling highly is 100～150mm.Whenever advance pipe joint and should proofread guide rail elevation, center line and level, and along with guided way is in time proofreaied and correct in the variation of pipeline jacking load.
(5) main top jack installation
Jack will be arranged take pipe centerline as axial symmetry.Main top oil cylinder frame is installed and is wanted accurate positioning, guarantees the correct position of cylinder force point, and its elevation and plane alignment error should be controlled in the 3mm.The oil cylinder errors of centration that is installed on the oil cylinder frame is controlled in the 3mm.Jack is fixed on the support, and its central point of making a concerted effort is on pipe centerline; The oil circuit of jack should be in parallel, and every jack should have oil-feed, move back oily control system.The position of jack is positioned at 1/3～1/4 place of pipeline perpendicular diameter, makes jack make a concerted effort the position of position and jacking drag on same axis, avoids producing the top couple, makes pipeline generation vertical error.
(6) oil pump is installed
Oil pump is arranged near the jack, and oil pipe is straight, corner is few; Oil pump should be complementary with jack, and emergency bearing oil pump is arranged; Oil pump installs, and carries out test running.When beginning, jacking slowly carries out, after each contact site driving fit, again by normal move speed jacking; If find in the jacking that oil pressure increases suddenly, stop immediately jacking, check reason and continue after treatment jacking; When jack piston was return, oil pressure was not too much, and speed must not be too fast.
(7) top iron is installed
Top iron adopts the cast-steel integral casting or adopts the shaped steel welding fabrication.The vertical top of single file iron center line is consistent with conduit axis; Two center lines of the vertical top of duplicate rows iron are parallel, and equate with the tubular axis linear distance, and will be perpendicular to the pipe end plane.The adjacent surface of top iron is orthogonal, on the iron of top locking device is arranged, and top iron should be able to keep stable when placing.When vertically top iron contacts with end surfaces, must make vertical top iron origin of force height and position be positioned at external diameter 1/3～1/4 place, cause front pipe to bow to prevent that origin of force is too high.When top power was larger, end surfaces should add arched top iron steel plate, to increase the lifting surface area of pipe end, improved its stressing conditions, prevented that pipe from damaging when top power is excessive.When changing top iron, use first the large top iron of length, should lock after the iron assembly unit of top.
(8) construction of turnover hole and sealing
Equipment installs a complete set of jacking device of rear reply and does the primary system debugging, after definite jacking device service behavior is good, and beginning jacking work.When growing apart from jacking, be to reduce the jacking resistance, make sealing ring at the portal place so that the thixotropic slurry performance drag-reduction effect that pours into.
(9) pipeline jacking
After dismounting is sealed up a door, should begin immediately the jacking head, after the jacking 300mm, unlatching adds the mud system and injects mud, in order to regulate the creeping of dregs and keep earth pressure balance.When head just buries, because head does not have enough resisting moment in orbit, head easily produced rotation when cutterhead was rotated, so when the initial 2m that buries, move speed is controlled at below the 5mm/min, in case the rotation of stop machine head, and incessantly observation airplane head inclination angle and the anglec of rotation, the inclination angle changes with the levelling of correction jack, and the anglec of rotation is greater than ± 50 degree, and cutterhead is opened the counter-rotating levelling; In the non-rotary situation of head behind the jacking 2m, strengthen gradually move speed.When head buried not yet fully, support pressure was controlled at 0.1～0.15MPa.After head all buried, lower the first pipe joint was done rear enclosed.After rear enclosed is complete, annotate the space of cement mortar filling head outside backbreaking at 1: 2 to the head shell injected hole, grouting pressure is controlled at 0.4MPa.The hole soil property is unstable when preventing that head from just appearing produces landslide, locates built-in rigidity piston ring at the hole.Rear enclosed adopts the ring-shaped rubber plate to be close to the soil body, and the hole side wall covers pressure with doughnut-shaped steel plate, and the running pulp phenomenon occurs when preventing from annotating thixotropic slurry.Control support pressure according to predefined parameter during jacking, meet sand gravel layer, when nearer apart from building, soil pressure is set suitably and is strengthened, and improves safety factor.The thixotropic slurry drag reduction is the drag reduction mode that long-distance pipe-jacking construction often adopts, and can effectively reduce resistance, lengthens to greatest extent apex distance.Be provided with the thixotropic slurry injected hole at the head afterbody, every joint concrete reinforced pipe is established injected hole, at any time slip casting during jacking.Move speed is controlled at 30～50mm/min, uses low speed when front 30m and correction, and looking afterwards is unearthed stirs, the cutterhead torque condition is suitably accelerated move speed.During lower pipe, stop under the jacking state at head, cutterhead idle running 3～5min closes conveying worm spoil disposal hydraulic pressure door when shutting down, and outage is to guarantee soil pressure storehouse soil pressure.
If center, height variation then will stop jacking immediately greater than ± 20mm, correction is proofreaied and correct and should slowly be carried out, and tube coupling is resetted gradually, must not suddenly entangle vigour.When wherein rectifying a deviation elevation, the pipe on the track will add counterweight; During the correction center, the pipe on the track will add supported on both sides.After head all enters the hole, and elevation, centre deviation will in time adopt the head correcting device to rectify a deviation during greater than 10mm, and the center is controlled in the 5mm, elevation is controlled at ± 10mm in, tool heads self straightening method is adopted in bearing calibration.The effective control tool head of this method for correcting error is the state of four direction up and down, and the amplitude of at every turn rectifying a deviation is measured the off normal judgement take 5mm as a unit according to inclinometer and the laser transit of tool heads, if when trend does not reduce, increases the correction dynamics; If when trend stability or minimizing, should keep this correction dynamics, continue jacking; When off normal trend is opposite, then need the correction dynamics is reduced gradually.In the pipeline jack-in process, if move speed is on the low side in fine silty layer, turn down the concentration of hydraulic mixture into mud, reduce move speed.When running into the different soil layer of soft or hard degree, judge geological conditions by the torque of cutterhead.If suddenly hardening then should add entry or mud in native storehouse.
(10) be unearthed
The soil that excavates in the push-bench course of work is transported on the belt conveyer through conveying worm first, is transported in the battery truck through belt conveyer again, and battery truck is transported to active well, and Tu Chang is deposited on last vertical handling to ground, regularly outward transport.
The present invention has that construction speed is fast, the significant advantage of social benefit.
The specific embodiment
The present embodiment construction sequence comprises:
(1) measures unwrapping wire
Lay temporary bench mark and conduit axis control stake, during the construction line-putting, establish Center stake every 20m, the place arranges Center stake at manhole.
(2) construction of working shaft
In active well reservation notch suitable for reading, steel bar concrete precast slab is installed, is wanted the seat slurry full in the notch.The wall of laying bricks at precast plate reserved opening place, all bricks are wanted saturated with water, and Ying Manpu, full squeezing are taken up and down block when building by laying bricks or stones, and thickness of mortarat bed joint and perpends width should be even, and vertical straight joint must not be arranged.When building manhole by laying bricks or stones, should install synchronously and mark time, want accurately the position, must not trample before masonry mortar reaches regulation compressive strength after the installation of marking time.
(3) parados is installed behind the assembling
The parados back soil body must be evenly closely knit behind the assembling, and wall should be smooth, and with pipeline jacking perpendicular direction; Back soil body wall should be close to rear parados, should adopt the sand material filling closely knit when hole is arranged.The bottom of parados following 500mm at the bottom of working pit behind the assembling, thus make rear jack center of effort highly be not less than 1/3 of back lumps of wood height, the point of making a concerted effort of being broken ground behind origin of force and the wall is consistent.
(4) guide rails assembling
During guide rails assembling and active well base plate pre-embedded steel slab weld, and enclose the jail with type steel support.To check first the pipeline center position before the guide rails assembling, guarantee that the elevation of guide rail, axial location are accurate.The rail axis position deviation is no more than 3mm, and the elevation of top surface deviation is no more than 3mm, is no more than 2mm apart from deviation in two rails.The guide rail end can not be too far away apart from the work wall, should be controlled at about 500mm, and reserving seam during guide rails assembling highly is 120mm.Whenever advance pipe joint and should proofread guide rail elevation, center line and level, and along with guided way is in time proofreaied and correct in the variation of pipeline jacking load.
(5) main top jack installation
Jack will be arranged take pipe centerline as axial symmetry.Main top oil cylinder frame is installed and is wanted accurate positioning, guarantees the correct position of cylinder force point, and its elevation and plane alignment error should be controlled in the 3mm.The oil cylinder errors of centration that is installed on the oil cylinder frame is controlled in the 3mm.Jack is fixed on the support, and its central point of making a concerted effort is on pipe centerline; The oil circuit of jack should be in parallel, and every jack should have oil-feed, move back oily control system.The position of jack is positioned at 7/24 place of pipeline perpendicular diameter, makes jack make a concerted effort the position of position and jacking drag on same axis, avoids producing the top couple, makes pipeline generation vertical error.
(6) oil pump is installed
Oil pump is arranged near the jack, and oil pipe is straight, corner is few; Oil pump should be complementary with jack, and emergency bearing oil pump is arranged; Oil pump installs, and carries out test running.When beginning, jacking slowly carries out, after each contact site driving fit, again by normal move speed jacking; If find in the jacking that oil pressure increases suddenly, stop immediately jacking, check reason and continue after treatment jacking; When jack piston was return, oil pressure was not too much, and speed must not be too fast.
(7) top iron is installed
Top iron adopts the cast-steel integral casting or adopts the shaped steel welding fabrication.The vertical top of single file iron center line is consistent with conduit axis; Two center lines of the vertical top of duplicate rows iron are parallel, and equate with the tubular axis linear distance, and will be perpendicular to the pipe end plane.The adjacent surface of top iron is orthogonal, on the iron of top locking device is arranged, and top iron should be able to keep stable when placing.When vertically top iron contacts with end surfaces, must make vertical top iron origin of force height and position be positioned at external diameter 7/24 place.When top power was larger, end surfaces should add arched top iron steel plate.When changing top iron, use first the large top iron of length, should lock after the iron assembly unit of top.
(8) construction of turnover hole and sealing
Equipment installs a complete set of jacking device of rear reply and does the primary system debugging, after definite jacking device service behavior is good, and beginning jacking work.When growing apart from jacking, make sealing ring so that the thixotropic slurry performance drag-reduction effect that pours at the portal place.
(9) pipeline jacking
After dismounting is sealed up a door, should begin immediately the jacking head, after the jacking 300mm, unlatching adds the mud system and injects mud, in order to regulate the creeping of dregs and keep earth pressure balance.When head just buries, because head does not have enough resisting moment in orbit, head easily produced rotation when cutterhead was rotated, so when the initial 2m that buries, move speed is controlled at below the 5mm/min, and incessantly observation airplane head inclination angle and the anglec of rotation, and the inclination angle changes with the levelling of correction jack, the anglec of rotation is greater than ± 50 degree, and cutterhead is opened the counter-rotating levelling; In the non-rotary situation of head behind the jacking 2m, strengthen gradually move speed.When head buried not yet fully, support pressure was controlled to be 0.1MPa.After head all buried, lower the first pipe joint was done rear enclosed.After rear enclosed is complete, annotate the space of cement mortar filling head outside backbreaking at 1: 2 to the head shell injected hole, grouting pressure is controlled to be 0.4MPa.Locate built-in rigidity piston ring at the hole.Rear enclosed adopts the ring-shaped rubber plate to be close to the soil body, and the hole side wall covers pressure with doughnut-shaped steel plate.Control support pressure according to predefined parameter during jacking, meet sand gravel layer, when nearer apart from building, soil pressure is set suitably and is strengthened.Be provided with the thixotropic slurry injected hole at the head afterbody, every joint concrete reinforced pipe is established injected hole, at any time slip casting during jacking.Move speed is controlled at 40mm/min, uses low speed when front 30m and correction, and looking afterwards is unearthed stirs, the cutterhead torque condition is suitably accelerated move speed.During lower pipe, stop under the jacking state at head, cutterhead idle running 3～5min closes conveying worm spoil disposal hydraulic pressure door when shutting down, and outage is to guarantee soil pressure storehouse soil pressure.
If center, height variation then will stop jacking immediately greater than ± 20mm, correction is proofreaied and correct and should slowly be carried out, and tube coupling is resetted gradually, must not suddenly entangle vigour.When wherein rectifying a deviation elevation, the pipe on the track will add counterweight; During the correction center, the pipe on the track will add supported on both sides.After head all enters the hole, and elevation, centre deviation will in time adopt the head correcting device to rectify a deviation during greater than 10mm, and the center is controlled in the 5mm, elevation is controlled at ± 10mm in, tool heads self straightening method is adopted in bearing calibration.The effective control tool head of this method for correcting error is the state of four direction up and down, and the amplitude of at every turn rectifying a deviation is measured the off normal judgement take 5mm as a unit according to inclinometer and the laser transit of tool heads, if when trend does not reduce, increases the correction dynamics; If when trend stability or minimizing, should keep this correction dynamics, continue jacking; When off normal trend is opposite, then need the correction dynamics is reduced gradually.In the pipeline jack-in process, if move speed is on the low side in fine silty layer, turn down the concentration of hydraulic mixture into mud, reduce move speed.When running into the different soil layer of soft or hard degree, judge geological conditions by the torque of cutterhead.If suddenly hardening then should add entry or mud in native storehouse.
(10) be unearthed
The soil that excavates in the push-bench course of work is transported on the belt conveyer through conveying worm first, is transported in the battery truck through belt conveyer again, and battery truck is transported to active well, and Tu Chang is deposited on last vertical handling to ground, regularly outward transport.
Claims (4)
1. pipe jacking construction method is characterized in that construction sequence comprises:
(1) measures unwrapping wire
Lay temporary bench mark and conduit axis control stake, during the construction line-putting, establish Center stake every 20m, the place arranges Center stake at manhole;
(2) construction of working shaft
In active well reservation notch suitable for reading, steel bar concrete precast slab is installed, is wanted the seat slurry full in the notch; The wall of laying bricks at precast plate reserved opening place, all bricks are wanted saturated with water, and Ying Manpu, full squeezing are taken up and down block when building by laying bricks or stones, and thickness of mortarat bed joint and perpends width should be even, and vertical straight joint must not be arranged; When building manhole by laying bricks or stones, should install synchronously and mark time, want accurately the position, must not trample before masonry mortar reaches regulation compressive strength after the installation of marking time;
(3) parados is installed behind the assembling
The parados back soil body must be evenly closely knit behind the assembling, and wall should be smooth, and with pipeline jacking perpendicular direction; Back soil body wall should be close to rear parados, should adopt the sand material filling closely knit when hole is arranged; The bottom of parados following 500mm at the bottom of working pit behind the assembling, thus make rear jack center of effort highly be not less than 1/3 of back lumps of wood height, the point of making a concerted effort of being broken ground behind origin of force and the wall is consistent; Parados verticality allowable variation is parados height behind 0.1% assembling behind the assembling, and horizontal torsion degree allowable variation is parados length behind 0.1% assembling;
(4) guide rails assembling
During guide rails assembling and active well base plate pre-embedded steel slab weld, and enclose the jail with type steel support; To check first the pipeline center position before the guide rails assembling, guarantee that the elevation of guide rail, axial location are accurate; The rail axis position deviation is no more than 3mm, and the elevation of top surface deviation is no more than 3mm, is no more than 2mm apart from deviation in two rails; The guide rail end can not be too far away apart from the work wall, should be controlled at about 500mm, and reserving seam during guide rails assembling highly is 100～150mm;
(5) main top jack installation
Jack will be arranged take pipe centerline as axial symmetry; Main top oil cylinder frame is installed and is wanted accurate positioning, guarantees the correct position of cylinder force point, and its elevation and plane alignment error should be controlled in the 3mm; The oil cylinder errors of centration that is installed on the oil cylinder frame is controlled in the 3mm; Jack is fixed on the support, and its central point of making a concerted effort is on pipe centerline; The oil circuit of jack should be in parallel, and every jack should have oil-feed, move back oily control system; The position of jack is positioned at 1/3～1/4 place of pipeline perpendicular diameter, makes jack make a concerted effort the position of position and jacking drag on same axis, avoids producing the top couple, makes pipeline generation vertical error;
(6) oil pump is installed
Oil pump is arranged near the jack, and oil pipe is straight, corner is few; Oil pump should be complementary with jack, and emergency bearing oil pump is arranged; Oil pump installs, and carries out test running; When beginning, jacking slowly carries out, after each contact site driving fit, again by normal move speed jacking; If find in the jacking that oil pressure increases suddenly, stop immediately jacking, check reason and continue after treatment jacking; When jack piston was return, oil pressure was not too much, and speed must not be too fast;
(7) top iron is installed
Top iron adopts the cast-steel integral casting or adopts the shaped steel welding fabrication; The vertical top of single file iron center line is consistent with conduit axis; Two center lines of the vertical top of duplicate rows iron are parallel, and equate with the tubular axis linear distance, and will be perpendicular to the pipe end plane;
(8) construction of turnover hole and sealing
Equipment installs a complete set of jacking device of rear reply and does the primary system debugging, after definite jacking device service behavior is good, and beginning jacking work; When growing apart from jacking, make sealing ring so that the thixotropic slurry performance drag-reduction effect that pours at the portal place;
(9) pipeline jacking
After dismounting is sealed up a door, should begin immediately the jacking head, after the jacking 300mm, unlatching adds the mud system and injects mud, in order to regulate the creeping of dregs and keep earth pressure balance; When head just buries, because head does not have enough resisting moment in orbit, head easily produced rotation when cutterhead was rotated, so when the initial 2m that buries, move speed is controlled at below the 5mm/min, and incessantly observation airplane head inclination angle and the anglec of rotation, and the inclination angle changes with the levelling of correction jack, the anglec of rotation is greater than ± 50 degree, and cutterhead is opened the counter-rotating levelling; In the non-rotary situation of head behind the jacking 2m, strengthen gradually move speed; When head buried not yet fully, support pressure was controlled at 0.1～0.15MPa; After head all buried, lower the first pipe joint was done rear enclosed; After rear enclosed is complete, annotate the space of cement mortar filling head outside backbreaking at 1: 2 to the head shell injected hole, grouting pressure is controlled at 0.4MPa; Locate built-in rigidity piston ring at the hole; Rear enclosed adopts the ring-shaped rubber plate to be close to the soil body, and the hole side wall covers pressure with doughnut-shaped steel plate; Control support pressure according to predefined parameter during jacking, meet sand gravel layer, when nearer apart from building, soil pressure is set suitably and is strengthened; Be provided with the thixotropic slurry injected hole at the head afterbody, every joint concrete reinforced pipe is established injected hole, at any time slip casting during jacking; Move speed is controlled at 30～50mm/min, uses low speed when front 30m and correction, and looking afterwards is unearthed stirs, the cutterhead torque condition is suitably accelerated move speed; During lower pipe, stop under the jacking state at head, cutterhead idle running 3～5min closes conveying worm spoil disposal hydraulic pressure door when shutting down, and outage is to guarantee soil pressure storehouse soil pressure;
If center, height variation then will stop jacking immediately greater than ± 20mm, correction is proofreaied and correct and should slowly be carried out, and tube coupling is resetted gradually, must not suddenly entangle vigour; When wherein rectifying a deviation elevation, the pipe on the track will add counterweight; During the correction center, the pipe on the track will add supported on both sides; After head all enters the hole, and elevation, centre deviation will in time adopt the head correcting device to rectify a deviation during greater than 10mm, and the center is controlled in the 5mm, elevation is controlled at ± 10mm in, tool heads self straightening method is adopted in bearing calibration; The effective control tool head of this method for correcting error is the state of four direction up and down, and the amplitude of at every turn rectifying a deviation is measured the off normal judgement take 5mm as a unit according to inclinometer and the laser transit of tool heads, if when trend does not reduce, increases the correction dynamics; If when trend stability or minimizing, should keep this correction dynamics, continue jacking; When off normal trend is opposite, then need the correction dynamics is reduced gradually; In the pipeline jack-in process, if move speed is on the low side in fine silty layer, turn down the concentration of hydraulic mixture into mud, reduce move speed; When running into the different soil layer of soft or hard degree, judge geological conditions by the torque of cutterhead; If suddenly hardening then should add entry or mud in native storehouse;
(10) be unearthed
The soil that excavates in the push-bench course of work is transported on the belt conveyer through conveying worm first, is transported in the battery truck through belt conveyer again, and battery truck is transported to active well, and Tu Chang is deposited on last vertical handling to ground, regularly outward transport.
2. pipe jacking construction method according to claim 1 is characterized in that whenever having advanced pipe joint and should proofread guide rail elevation, center line and level, and along with the timely corrective rail of variation of pipeline jacking load.
3. pipe jacking construction method according to claim 1 is characterized in that the adjacent surface of top iron is orthogonal, on the iron of top locking device is arranged, and top iron should be able to keep stable when placing; When vertically top iron contacts with end surfaces, must make vertical top iron origin of force height and position be positioned at external diameter 1/3～1/4 place; When top power was larger, end surfaces should add arched top iron steel plate; When changing top iron, use first the large top iron of length, should lock after the iron assembly unit of top.
4. pipe jacking construction method according to claim 2 is characterized in that the adjacent surface of top iron is orthogonal, on the iron of top locking device is arranged, and top iron should be able to keep stable when placing; When vertically top iron contacts with end surfaces, must make vertical top iron origin of force height and position be positioned at external diameter 1/3～1/4 place; When top power was larger, end surfaces should add arched top iron steel plate; When changing top iron, use first the large top iron of length, should lock after the iron assembly unit of top.
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| CN 201210575941 CN103046638A (en) | 2011-04-28 | 2011-04-28 | Pipe jacking construction method |
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| CN 201110119467 Division CN102277898B (en) | 2011-04-28 | 2011-04-28 | Drain pipe jacking construction method |
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| CN105442694A (en) * | 2015-11-16 | 2016-03-30 | 中科路域（北京）生态投资有限公司 | Method for constructing top pipe of prestressed reinforced concrete sewage intercepting pipe |
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| CN108194704A (en) * | 2018-01-03 | 2018-06-22 | 杭州水利水电勘测设计院有限公司 | One kind wears river technique |
| CN108561137A (en) * | 2018-03-28 | 2018-09-21 | 中铁上海工程局集团有限公司 | A kind of rectangular top tube top iron construction to retract and application method |
| CN108916467A (en) * | 2018-06-08 | 2018-11-30 | 中国五冶集团有限公司 | Heavy caliber sigmoid curve pipe jacking construction method |
| CN109141716A (en) * | 2018-08-16 | 2019-01-04 | 中铁二十局集团第工程有限公司 | A kind of pipe gallery big cross section rectangular top pipe construction pipe-soil contact pressure test method |
| CN112524335A (en) * | 2019-09-17 | 2021-03-19 | 浙江长兴市政建设有限公司 | Non-excavation jacking external branch pipe construction method |
| CN110925489A (en) * | 2019-12-12 | 2020-03-27 | 贵州建工集团第一建筑工程有限责任公司 | Opposite jacking and butt joint construction method for finished pipes |
| CN111335919A (en) * | 2020-03-20 | 2020-06-26 | 重庆渝高科技产业(集团)股份有限公司 | Prefabricated pipe joint pushing method |
| CN111395496A (en) * | 2020-03-25 | 2020-07-10 | 刘兵 | Hydraulic rotary crossing puncture method |
| CN111810715A (en) * | 2020-06-18 | 2020-10-23 | 中铁工程装备集团有限公司 | Trenchless pipeline updating method and construction system |
| CN111810715B (en) * | 2020-06-18 | 2021-09-24 | 中铁工程装备集团有限公司 | Trenchless pipeline updating method and construction system |
| CN112113029A (en) * | 2020-10-21 | 2020-12-22 | 中国十七冶集团有限公司 | Pipe jacking construction method under silty soil geological condition |
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